Chuck structure



Feb. 18, 1930. A. H. KATTERJOHN CHUCK STRUCTURE Filed Oct. 24, 192'? v 2 Sheets-Sheet l alito/z ma! 2 Sheets sheet 2 Summa Feb. 18, 1930. A. H. KATTERJOHN CHUCK STRUCTURE Filed oct. '24, 192'/ IME E Patented Feb. 18, 1930 i UNI TIES PATENT C F- AUGUST H.- KATTERJV'OHN, OF DENVER, COLORADO, ASSIGNOR TO GARDNER-DENVER ICOMPANY, OFIDENVER, COLORADO, A-CORPORATION 01T'` DELAWARE u CHUCK STRUCTURE vAlrplication filedrv October 24, 1927. Serial No. 228,355.

Thek present invention relates to chuck structures for rock drills and similarvtools,

andthe principal object is toprovide means whereby the working partscan be keptclear of dirt, thus eliminating much wear that otherwise takes place, and incidentally to secure proper lubrication'of the moving elements.

n -rr`An embodiment'of the inventionA applied to'k drills in which kthe chuck is r-otated by a motor other than the drilling motor,fis illustrated in the' accompanying drawings, where- .4. ih' A Figure 1 is a longitudinal sectional view through the main portion of the drill,

Figure2 is a top plan View with the chuck rotating- `motor shown in sectionl and taken substantiallyon the line 2 2 of Figure 1, n Y

Figure 3 is a crosssectional View on the line 3 3 of Figure 1,

Figure 4 is a detail sectional view showing the drill rotating motor in elevation and taken on the line 4-4 of Figure 2,

Figure 5 is a view partially in elevation and partially in section of the chuck sleeve, Figure 6 is a rear elevation of saidA chuck sleeve, Y.

Figure 7 is a cross sectional view on the line- 7-7 vot Figure 1.

The drill structure shown consists of a cylinder or barrel 8, in which is a reciprocatory hammer piston 9, having a'freducedhammer extension 10. A chuck housing l1 is located in advance'of the barrel 8, and interposed bef tween the two is a spacer 12, on which is formed the casing or cylinder 13 ofthe chuck rotating motor.

In the housing 11 is a rotatable chuck sleeve 14 provided at its rear end with an internal chamber 15;, having communication witha socket' 16 that opens through the front end,

of the sleeve. A chuck 17 is fitted into the socket and preferably has a screw threaded engagement 18 therein. This chuck is provided at its outer end with a terminal flange 19 that overlies the sleeve 14 and the housing v1K1, and constitutes a dirt shield that isr spaced from the front end of the housing, as clearly shown in Fig. 1. The chuck is designed to receive the rear end of a drill steel 20. Proj ecting into the front end of the rear internal chamber 15 of the. chuck sleeve l14 is altappet 21, against the frontend of which the steel 2O abuts,v the rearend being struclcby .the hammer extension :10 of thelpiston 9 that thus enters the rear end of the chamber 15.

The. kchuck sleeve y14 is provided in its external face lwith a plurality of longitudinally disposed grooves or channels 22thatlare open at the front end of the sleeve,and are thus in communication with the, space behind the dirt shield 19, The rear ends of thse Challnels are in communication with the chamber 15 oflthe chuck sleeve through ports 23.'

2 The chuck rotatingmotor consists of the casing 13 and intermeshing piston gears 24 locatedin the casing. One of thesepiston gears is mounted on ashaft 251carrying afworm 26 and this worm is in mesh with a worm gear 27 that is mountedyon rear head or sleeve 28. The sleeve 28 hasan interlugged connection 29 with the-,rear endwofthe sleeve 14. Consequently when lthe motor isin operation, the sleeveQ14,.the.chuck.17, andVv the drill steel 20-will bei-rotated.:v The worm ,gear 27 operates in achamber 130, and this chamber, as showndn Fig-ure 1,- has open communication with the: grooves 22ofthe chuck sleeve. The chamber :furthermore has one or more exhaust .ports 31 opening directly .to atmosphere.,

f Motive-fluid is supplied to the. chuckv rotatingmotor through a passageway 32 that opens on the lower side of theintermeshing gear pist0ns24y (see F ig.` 4.), and from the outer -or upper side of said intermeshing portions of the gear pistons, an exhaust passageway 33 leads lto the upper side ofthe worm gear :chamber 30, asshownjn .Figure3. A I

l/Vith this construction, air exhausting from the drill rotatingmotor will pass into l the worm gearch-amber 30. Part will then exhaust to atmospherethrough the ports 31, `but lthe ports are not of suiicient size to allow itall yto thus exhaust, soy that part will be directed around the rear end of the chuck sleeve 14 into the chamber 15, and thence ythrough the;ports 23, to the channels 22. Para as indicated by the arrows in Figure 1,

will .passaround the exterior of the chuck ysleeve 14 into saidchannels. As ay result,

ffront end and and the inner ends of the grooves, of a inotorrotated by the motor,

is directed as above described through they` bearings, serves to adequately lubricate the saine.

From the foregoing, it is thought that the construction, operation and many advantages of the'herein described invention will be ap'- parent-to those skilled in the art, without further description, and it will be understood that various 'changes in they size, shape, proportion and minor details of c-onstruction may be resorted to without departing fromv the spirit or sacrificing any of the advantages' of the invention.

What I claim, is: l. In a fluid actuated tool, the combination with a chuck housing and a chuck sleeve rotatable therein having an internal chamber, said sleeve having external longitudinal grooves opening through its front end and ports connecting the chamberand rear ends of the grooves, of Va motor for rotatiiigzthe y,chuck sleeve, means for supplying motive fluid to the motor, and means for directing a part of the exhaust to atmosphere and a part to the chamber and thence t-o the grooves.

2. In a fluid actuated tool, thevcombination with a chuck housing anda chuck sleeve rotatably mounted therein and having an internal chamber, said chuck sleeve having external longitudinal grooves opening at its ports connecting the chamber for rotating the Ichuck sleeve, a driving worm aworm gear engage and drivenr by the worm and connected to the chucksleeve, a chamber in which the worin 'rotatably mounted passageway for thefmoti've Huid leading from the motor to the worm gear chamber, said worm gear chamber having an exhaustl port to atmosphere that permits a portion only of the exhaust to pass therethrough,the remainder passing through the sleeve chamber and external grooves to atmosphere.

4. In a fluid said chuck sleeve having internal chamber,

external' longitudinal grooves opening at its.

front end and ports connecting the chamber and the inner ends ofthe grooves, of a chuck in the chuck sleeve having a dirt shield overhanging the front end of they chuck housing, a tappet in the front end of the chuck sleeve, chamber, 4a drilling ypiston movable into the rear end of the sleeve vchamber andV operating on rotating the chuck sleeve, a driving worm 4 actuated tool,"the combina-i tion with a chuck housing and a chuck sleeve 'therein and -having an-V the tappet, a motor forV rotated by the motor, a worm gear engaged andv driven 'by the worin and connected to the chu-ck sleeve, a chamber in whichA the worin operates that is in-communication with the chuck sleeve chamber, means for supplying motive fluid to the motor, and an exhaust passageway for the motive fluid leading from the motor to the worm gear chamber.

In testimony whereof, I aliix my signature.

AUGUST KATTERJOI-IN.A

operates that is in communication with the chuck sleeve chamber, means for supplying motive fluid to the motor, and an exhaust passageway for the motive fluid leading'from lVV the motor to the worm gear chamber. v

3. In a Huid actuated tool, the combination Y with a chuck housing and a chuck sleeve rotatably mounted therein and having an 'internal chamber, ternal longitudinal grooves opening at its Vfront end and ports connecting the chamber said chuck sleeve having exand the inner ends of the grooves, of av motor for rotating the chuck sleeve, a driving worm rotated by the motor, a worm gear engaged and kdriven by the worm and connected to the chuck sleeve, a chamber in which the 'worm operates that isin Icommunication with the chuck sleeve' chamber,

ing motive fluid to the mot-or, and an exhaust meansl for supplyioo iio 

